“Stress causes stomach ulcers”

For many years, it was widely believed that the pressures and anxieties of modern life directly caused stomach ulcers. This idea became deeply ingrained in popular culture and even in medical understanding for a significant period. The image of a high-strung individual developing a "stress ulcer" was a common one, suggesting that mental strain could literally eat away at one's stomach lining.

However, scientific advancements have since clarified the primary culprits behind most peptic ulcers. The vast majority are now known to be caused by infection with the bacterium Helicobacter pylori (H. pylori). This discovery, notably by Barry Marshall and Robin Warren in the early 1980s, revolutionized the understanding and treatment of ulcers, shifting the focus from diet and stress management to antibiotic therapy. Another major cause is the regular use of non-steroidal anti-inflammatory drugs (NSAIDs) like ibuprofen or aspirin, which can damage the stomach's protective lining.

While stress is not the direct cause of most ulcers, the long-standing belief isn't entirely without a basis in reality. Intense psychological stress can indeed worsen the symptoms for individuals who already have an ulcer, making the pain more pronounced or frequent. Moreover, in severe physical stress situations, such as critical illness or major trauma, the body's physiological response can contribute to the development of specific types of ulcers, sometimes called "stress ulcers," though these are distinct from the more common H. pylori or NSAID-induced ulcers. This nuanced relationship, where stress can exacerbate or contribute under certain conditions, likely fueled and sustained the popular misconception over time.